stepped down after admitting to have an affair with the awe tore of his biography paula broadwell. prosecutors say they discovered it because of threatening e-mails broadwell allegedly sent. they were sent to a woman close to petraeus. she complained to the fbi and that's how the investigation started. >>> it is official. president obama can claim victory in florida. the state finished counting the votes yesterday. they say the president won by 74,000 votes, less than 1%. >>> still to come, an age-old question, are there ghosts out there? we followed two bay area research teams. >>> another cold night, freezing temperatures in some areas. how long will they last? plus weather and sports coming up. >>> welcome back to nbc bay area. busy day for sports in the bay area. let's get straight to the action with some college football. who else the cal bears taking on oregon. third quarter, bears trail by a touch down. allen is intercepted by campbell. the next play, marcus finds josh for a 35-yard strike. he got three touchdowns. six were thrown today. they never look back and win 59-17.